docs: remove secure boot and flash encryption from CMake pending features

docs/en/cmake-pending-features.rst

@@ -2,8 +2,6 @@
    The following features are not yet supported with the CMake-based build system:
 
    - Eclipse IDE Documentation
-   - Secure Boot
-   - Flash Encryption
 
    Support for these features will be available before CMake becomes the default build system.